Yankees pitching prospect Albert Abreu had appendix surgery Wednesday, a source told NJ Advance Media.
He's expected to leave the hospital Friday, the source said.
Baseball America ranks Abreu the Yankees' No. 6 overall prospect and the 77th best in the game. According to MLB.com, Abreu finished 2017 as the team's No. 7 prospect and he'll go into 2018 as No. 74 in the game.
It was unclear how much time the 22-year-old right-hander will miss. Yankees pitchers and catchers report to major-league spring training at George M. Steinbrenner Field in Tampa, Florida, on Tuesday.